build: pin final microLXMF bridge closure

platformio.ini

@@ -106,9 +106,9 @@ lib_deps =
     ; aad87f5: transactional message persistence and rollback recovery, keeps the
     ; rollback snapshot off the LVGL task stack, bounds-checks empty LXMF fields,
     ; and attaches delivery callbacks to the transport-owned PacketReceipt.
-    ; 4c81297: d9bbc04 plus non-evicting guarded outbound admission and
-    ; serialized bridge queue ownership/retry behavior.
-    https://github.com/torlando-tech/microLXMF.git#4c812978a5e2435a6b4320a2990e8e295949ac04
+    ; 5a44862: 4c81297 plus persist-only-after-preparation semantics and
+    ; serialized native bridge transport callbacks/conformance closure.
+    https://github.com/torlando-tech/microLXMF.git#5a44862b85e902f351b756ee00482f3258b244f5
     lvgl/lvgl@^8.3.11
     bblanchon/ArduinoJson@^7.4.2
     hideakitai/MsgPack@^0.4.2

tests/reference/test_microlxmf_telemetry_field.py

@@ -22,7 +22,7 @@ def test_pinned_microlxmf_telemetry_field_roundtrip(tmp_path):
     if not (source / "LXMF" / "LXMessage.cpp").is_file():
         pytest.fail(f"pinned microLXMF source is unavailable at {microlxmf}")
 
-    expected = "4c812978a5e2435a6b4320a2990e8e295949ac04"
+    expected = "5a44862b85e902f351b756ee00482f3258b244f5"
     actual = subprocess.run(
         ["git", "-C", str(microlxmf), "rev-parse", "HEAD"],
         capture_output=True,